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EFFECTS OF L-PHENYLALANINE ON THE RADIATION SYNTHESIS OF POLY(N,N'-METHYLENEBISACRYLAMIde-co-4-VINYLPYRIdinE)(MICRO)GELS

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Chinese Journal of Polymer Science 2005年第6期23卷 643-650页

作者： Qing-de Chen Xing-hai Shen and Hong-cheng Gao department of Applied Chemistry,College of Chemistry and Molecular Engineering,Peking University,Beijing 100871,China Peking Univ Dept Appl Chem Coll Chem & Mol Engn Beijing 100871 Peoples R China

The effects of L-phenylalanine （L-Phe） on the synthesis ofpoly（N,N＇-methylenebisacrylamide-co-4-vinylpyridine）（poly（Bis-co-4-VP））（micro）gels by γ-ray irradiation were studied. The addition of L-Phe could not only decrease the gelation dose （Dg） of the synthesis obviously, but also transform the morphology of copolymer from microgel to gel. In addition, the swelling ability of the （micro）gels was also affected in the presence of L-Phe. The decrease of Dg was ascribed to the effect of pH, while the transformation of the morphology was ascribed to the effect of L-Phe on the stability of the poly（Bis-co-4-VP） microgel. Such an effect was confirmed further as compared with the effects of L-alanine, L-glutamic acid, L-arginine, sulfuric acid and aqueous ammonia.

关键词： L-Phenylalanine γ-Ray irradiation Gelation dose Morphology transformation (Micro)gel

Impact of Heart Rot of <i>Pericopsis elata</i>(Harms) Van Meeuwen on Yield at Harvest in Production Forests in South-Eastern Cameroon

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Open Journal of Forestry 2021年第3期11卷 315-329页

作者： René Samuel Gweth Likaa Godswill Ntsomboh-Ntsefong Fridolin Choula Nnanga M. Ruth Laure François Essouma Manga Jean-Lagarde Betti Alain Dongmo Ndongo din department of Plant Biology Faculty of Sciences University of Douala Douala Cameroon department of Plant Biology Faculty of Sciences University of Yaounde 1 Yaounde Cameroon Institute of Agricultural Research for development (IRAD) Yaounde Cameroon department of Biology of Animal Organisms Faculty of Sciences University of Douala Douala Cameroon

This study of the impact of heart rot of Pericopsis elata on logging yield was conducted in Libongo, in three logging concessions of the Société d'Exploitation Forestière et Agricole du Cameroun (SEFAC). An inventory of 92 P. elata stumps in four Annual Cutting Areas (AACs) divided among three Forest Management Units (FMUs) distinguished by Minimum Operating Diameter (MOD) revealed that 22 stumps were rotten. Decay was visible on stumps with a diameter of more than 100 cm with a frequency of occurrence of 23.91%, a percentage of abandonment of 55.20% and a yield of 44.79%. The most important economic loss was revealed on 9 abandoned whole logs that cumulated a volume of 145.547 m3. The correlation between the diameter of the stumps and that of the decay gives a coefficient or correlation rate r = 0.31. The MOD for P. elata could be 80 cm and covers the biological risk class. The results indicate that P. elata shows an increasing gradient of decay rate with increasing tree diameter, resulting in a loss of material for larger diameter trees, and consequently a decrease in material yield at processing.

关键词： Pericopsis elata Minimum Operating Diameter Heart Rot Stump Material Yield

Irritable bowel syndrome and chronic constipation: Fact and fiction

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World Journal of Gastroenterology 2015年第40期21卷 11362-11370页

作者： Massimo Bellini Dario Gambaccini Paolo Usai-Satta Nicola de Bortoli Lorenzo Bertani Santino Marchi Cristina Stasi Gastrointestinal Unit Department of GastroenterologyUniversity of Pisa Gastrointestinal Unit P. Brotzu Hospital department of Experimental and Clinical Medicine University of Florence Epidemiological Observatory Regional Health Agency of Tuscany

Irritable bowel syndrome(IBS) and functional constipation(FC) are the most common functional gastrointestinal disorders. According to the Rome ⅢCriteria these two disorders should be theoretically separated mainly by the presence of abdominal pain or discomfort relieved by defecation(typical of IBS) and they should be mutually exclusive. However,many gastroenterologists have serious doubts as regards a clear separation. Both IBS-C and FC,often associated with many other functional digestive and non digestive disorders,are responsible for a low quality of life. The impact of the media on patients' perception of these topics is sometimes disruptive,often suggesting a distorted view of pathophysiology,diagnosis and therapy. These messages frequently overlap with previous subjective opinions and are further processed on the basis of the different culture and the previous experience of the constipated patients,often producing odd,useless or even dangerous behaviors. The aim of this review was to analyze the most common patients' beliefs about IBS-C and CC,helping physicians to understand where they should focus their attention when communicating with patients,detecting false opinions and misconceptions and correcting them on the basis of scientific evidence.

关键词： Irritable bowel syndrome Chronic constipation Func

Simulation Analysis of Coal Mining with Top-Coal Caving Under Hard-and-Thick Strata

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Journal of China University of Mining and Technology 2006年第2期16卷 110-114页

作者： LIU Yu-de ZHANG Dong-sheng WANG Hong-sheng MA Li-qiang LU Xiu-ming School of Mineral ＆ Safety Engineering China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China Key Laboratory of Mining and Safety of Ministry of Education China University of Mining ＆ Technology Xuzhou Jiangsa 221008 China

The top-coal failing ability is a key factor to analyze for the application of coal mining with top-coal caving. Based on a hard-and-thick strata, which acts both as the floor of the upper coal seam and as the roof of the lower coal seam, nine mining projects wcrc put forward to examine the mining of upper and lower coal seams, and a numerical simulation was used to study in detail the corresponding top-coal compressed volume of the lower coal seam. By the simulation effects of different layouts of coalface, the rational mining method was determined to bc the staggered layout of coalface in the upper and the lower coal seam. This can ensure the successful use of fully-mechanized coalfacc with top--coal caving in the lower coal seam.

关键词： hard-and-thick strata falling ability compressed volume staggered layout

Quasi-Relativistic description of Hydrogen-Like Atoms

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Journal of Modern Physics 2020年第6期11卷 788-802页

作者： Luis Grave de Peralta department of Physics and Astronomy Texas Tech University Lubbock TX USA

Using a novel wave equation, which is Galileo invariant but can give precise results up to energies as high as mc2, exact quasi-relativistic quantum mechanical solutions are found for the Hydrogen atom. It is shown that the exact solutions of the Grave de Peralta equation include the relativistic correction to the non-relativistic kinetic energies calculated using the Schrödinger equation.

关键词： Quantum Mechanics Schrödinger Equation Relativistic Quantum Mechanics Klein-Gordon Equation Hydrogen Atom

离子淌度谱和SIMPLISMA用于痕量有机化合物的检测

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光谱学与光谱分析 2005年第9期25卷 1530-1533页

作者：张卓勇陈国祥 Harrington Peter de B 首都师范大学化学系 department of Chemistry and Biochemistry Center for Intelligent Chemical Instrumentation Clippinger Laboratories Ohio University Athens Ohio 45701-2979 USA

离子淌度谱(IMS)是检测痕量挥发性有机化合物的灵敏方法。SIMPLISMA(simpletouseinteractiveselfmodelingmixtureanalysis)是一种自模型曲线分辨方法。文章将SIMPLISMA用于DMMP,DIMP和deMP的IMS检测和数据的处理。这些化合物的IMS谱数据经SIMPLISMA处理后,可以提取出IMS的谱特征,并去除大部分噪声的影响。经SIMPLISMA提取的IMS谱可被用于其他计算,如曲线分辨和模式识别等。

关键词：离子淌度谱 SIMPLISMA 化学计量学数据处理甲基瞵酸酯

Distribution of Phosphorus in Sediments of Onshore Reed Areas of Lake Taihu

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Journal of China University of Mining and Technology 2007年第4期17卷 557-561页

作者： XU de-lan LEI Ze-xiang WANG Hong-jun HAN Bao-ping LIU Zheng-wen School of Environment and Spatial lnformatics China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China department of Environment Engineering Xuzhou Engineering College Xuzhou Jiangsu 221008 China department of Environmental Science and Engineering Zhongkai Agricultural Technological College Guangzhou Guangdong 510225 China Ecological Environment Research Center Chinese Academy of Sciences Beijing 100852 China Nanjing Institute of Geography and Limnology Chinese Academy of Sciences Nanjing Jiangsu 210008 China Aquatic Biology Institute Jinan University Guangzhou Guangdong 510632 China

To reveal additional effects of aquatic macrophytes on biogeochemical properties of onshore lake phosphorus and to investigate the ecological response of reed communities to this phosphorus,sediments from the Meiliangwan onshore reed area of Lake Taihu were sampled by using a columnar sampler (D=8 cm) on September 18,October 17 and december 3,2003. The samples were compared with those from macrophyte-free areas. The collected samples were dried naturally at room temperature,ground and screened with a 100 mesh sieve. The HClO4-H2SO4 digesting and H2SO4-H2O2 heating digesting methods were used to analyze the total amount of phosphorus (TP) contained in sedi-ments of the reed area and in tissues of reed roots and stems. The result shows: 1) the level of TP,from both the reed area sediment and the reference samples,is highest during the vigorous growing stage and lowest during the slow growing stage. The difference between the two levels is statistically significant (pdecreasing order: firous root > rhizome > stem. All are smaller in the level of phosphorous than that in rhizosphere sediments (0-2 cm).

关键词： Lake Taihu reed phosphorus sediment

Moxibustion regulates inflammatory mediators and colonic mucosal barrier in ulcerative colitis rats

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World Journal of Gastroenterology 2016年第8期22卷 2566-2575页

作者： Tie-Ming Ma Na Xu Xian-de Ma Zeng-Hua Bai Xing Tao Hong-Chi Yan Liaoning University of Traditional Chinese Medicine Shenyang 110847 Liaoning Province China

AIM: To observe the efficacy and mechanism of grain-sized moxibustion at different acupoints in a rat model of ulcerative colitis (UC). METHODS: Sprague-Dawley rats were randomly divided into control, UC model, grain-sized moxibustion at a single acupoint (CV 12), grain-sized moxibustion at two acupoints (CV 12 and CV 4), grain-sized moxibustion at three acupoints (CV 12, CV 4, and ST 36), and medication groups (n = 8/group). The UC model was established by enema of trinitrobenzene sulfonic acid. Direct moxibustion was used once a day for 7 d. Disease activity index (DAI) was evaluated before and after the treatment. Morphologic changes of intestinal tissue were observed under an optical microscope. The expression of tumor necrosis factor (TNF)-alpha and p38 mitogen-activated protein kinase (p38MAPK) in colonic tissue was detected using Western blot, and the levels of occludin and zonula occludens-1 (ZO-1) mRNAs were detected using reverse transcription PCR. RESULTS: Compared with the control group, the intestinal mucosae were incomplete in the model group, glandular structures were irregular, and submucosae were edematous, hyperemic, and infiltrated with inflammatory cells. The DAI scores and expression of TNF-alpha and p38MAPK were increased significantly in the model group compared to controls (Ps din and ZO-1 were reduced significantly (Ps del group, colonic mucosa and the arrangement of glands were complete and regular in the treatment groups. DAI scores and the expression of TNF-alpha and p38MAPK were reduced significantly in moxibustion groups compared to controls (Ps din and ZO-1 were increased significantly (Ps < 0.01). The improvements in the above indices in the three acupoints group and the medication group were superior to those in the single and two acupoints groups (all P < 0.05). CONCLUSION: Reduction of TNF-alpha and p38MAPK and increased expre

关键词： Different acupoints Grain-sized moxibustion Inflammatory factors Intestinal mucosal barrier Ulcerative colitis

Follow-up after gastrectomy for cancer:results of an international web round table

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World Journal of Gastroenterology 2014年第34期20卷 11966-11971页

作者： Gian Luca Baiocchi Yasuhiro Kodera Daniele Marrelli Fabio Pacelli Paolo Morgagni Franco Roviello Giovanni de Manzoni department of Medical and Surgical Sciences Surgical ClinicBrescia UniversityBrescia 25123Italy department of Gastroenterological Surgery Surgery ⅡNagoya UniversityNagoya 452-0813Japan department of Human Pathology and Oncology Surgical OncologySiena UniversitySiena 53011Italy department of Surgical Sciences Digestive SurgeryCatholic UniversityRome 00118Italy department of General Surgery MorgagniPierantoni HospitalForlì 47121Italy 1~(st) department of General Surgery Borgo Trento HospitalUniversity of VeronaVerona 37121Italy

Oncological follow-up after radical gastrectomy for cancer still represents a discrepancy in the field, with many retrospective series demonstrating that early diagnosis of recurrence does not result in an improvement in patient survival; yet, many centers with high quality of care still provide routine patient follow-up after surgery by clinical and instrumental controls. This was the topic for a web round table entitled “Rationale and limits of oncological follow-up after gastrectomy for cancer” that was launched one year before the 10th International Gastric Cancer Congress. Authors having specific expertise were invited to comment on their previous publications to provide the subject for an open debate. During a three-month-long discussion, 32 authors from 12 countries participated, and 2299 people visited the dedicated web page. Substantial differences emerged between the participants: authors from Japan, South Korea, Italy, Brazil, Germany and France currently engage in instrumental follow-up, whereas authors from Eastern Europe, Peru and India do not, and British and American surgeons practice it in a rather limited manner or in the context of experimental studies. Although endoscopy is still considered useful by most authors, all the authors recognized that computed tomography scanning is the method of choice to detect recurrence; however, many limit follow-up to clinical and biochemical examinations, and acknowledge the lack of improved survival with early detection.

关键词： Gastric cancer Recurrence Follow-up Diagnosis Prognosis Surgery Chemotherapy